Maintenance Methods for Common Faults of Automatic Spray Guns

Sometimes there are some problems in the use of automatic spray guns. Today, we conduct a detailed analysis of the common failures of automatic spray guns, and analyze the causes according to the phenomena and find solutions.

Ⅰ. The shape of the spray pattern of the automatic spray gun is biased to one side by the center of gravity

Cause: The center hole of the air cap or the atomization hole is blocked.

Countermeasures:

1. Clean the atomizing cap;

2. Replace the atomizing cap.

Ⅱ. The automatic spray gun is left or right

reason:

1. The fan control hole on one side of the gas cap is blocked;

2. The air cap is damaged.

Countermeasures:

1. Clean the atomizing cap;

2. Replace the atomizing cap.

Ⅲ. The center of the spray pattern of the automatic spray gun is too thick

reason:

1. The viscosity of the sprayed coating is too high;

2. The spraying pressure is too low;

3. The diameter of the nozzle and the thimble increase and decrease due to wear.

Countermeasures:

1. Reduce the viscosity of the coating;

2. Increase the spraying pressure;

3. Replace the nozzle set.

Ⅳ. The spray width of the automatic spray gun is split

reason:

1. The viscosity of the coating is too low;

2. The spraying pressure is too high;

3. The inner diameter of the fan control hole is too large;

4. The paint is not enough;

5. The atomizing air channel is blocked.

Countermeasures:

1. Increase the viscosity of the coating;

2. Reduce the spray pressure;

3. Replace the spray gun nozzle set;

4. Add enough paint;

5. Clean the air channel of the spray gun.

Ⅴ. Jump gun of automatic spray gun

reason:

1. The nozzle is not tightened or installed properly;

2. The needle seal kit is loose;

3. The connection nut of the automatic spray gun is loose (the lower pot spray gun);

4. Insufficient paint in the pot;

5. The nozzle set is damaged.

Countermeasures:

1. Tighten the nozzle or clean and install the nozzle set;

2. Fasten the thimble seal kit;

3. Tighten the connecting nut;

4. Supplementary coating;

5. Replace the nozzle set.

Ⅵ. The spray width of the automatic spray gun is heavy or heavy

reason:

1. The air outlet of the nozzle, thimble or air cap is blocked by debris;

2. The air cap or nozzle is damaged.

Countermeasures:

1. Cleaning nozzle set;

2. Replace the nozzle set.

Ⅶ. The automatic spray gun can not spray paint or a small amount of paint

reason:

1. The air supplement hole of the gun pot cover is blocked or the air cap and suction pipe are seriously blocked;

2. There is no paint in the pot;

3. The thimble stroke is too small.

Countermeasures:

1. Clean the air supplement hole, air cap and suction pipe on the lid;

2. Supplementary coating;

3. Rotate the paint flow adjustment knob to increase the stroke of the needle valve.

Ⅷ. Leakage of paint at the nozzle of the automatic spray gun

reason:

1. The thimble sealing nut is too tight;

2. There is a foreign body inside the nozzle port;

3. The nozzle and thimble are not matched or damaged;

4. The thimble return spring is broken or not installed.

Countermeasures:

1. Loosen the thimble sealing nut;

2. Clean the nozzle;

3. Replace the nozzle set;

4. Replace the thimble return spring or install the thimble return spring.

Ⅸ. The spray width of the automatic spray gun cannot be adjusted

reason:

1. The fan control holes on both sides of the air cap are blocked;

2. The spray width regulator is damaged or installed incorrectly;

3. The air passage of the automatic industrial paint spray gun fan control hole is blocked.

Countermeasures:

1. Clean the air cap;

2. Replace the spray adjuster or install the spray adjuster correctly;

3. Clean the air passage.

Ⅹ. The automatic spray gun cannot adjust the air pressure normally or the compressed air will be sprayed directly from the muzzle as soon as it is connected.

reason:

1. The air regulator is damaged or the air valve is damaged;

2. The return spring of the air valve is broken or not installed.

Countermeasures:

1. Replace the air regulator or air valve;

2. Replace the air valve return spring or install the air valve return spring.

Ⅺ. Automatic spray gun thimble seals leak paint

reason:

1. The thimble sealing ring is worn out;

2. The thimble sealing gasket is not installed;

3. The thimble sealing ring spring is damaged or not installed;

4. The thimble sealing nut is loose;